Bradysia fornicata, Vilkamaa & Suuronen, 2019

Vilkamaa, Pekka & Suuronen, Anna, 2019, Definition of the Bradysia luctifica group (Diptera, Sciaridae), with the description of five new species, Zootaxa 4576 (1), pp. 151-161 : 158

Bradysia fornicata sp. n.

Figs 1 B , 6

Material studied. Holotype male. MALAYSIA, Pahang, Genting , VII.1981, R.I. Vane-Wright. (in BMNH).

Description. Male. Head. Face and antenna concolorous pale brown, maxillary palpus yellow. Eye bridge 1–3 facets wide. Face with 33 short and fine setae. Clypeus with 1 seta. Maxillary palpus with 3 segments; 1 st segment large and much longer than other segments, 2 nd segment longer than 3 rd segment; 1 st segment with 6–7 setae, with well-demarcated, large dorsal patch of sensilla; surface of antennal flagellomeres smooth, rather sparsely setose, body of 4 th flagellomere 2.2x as long as wide, the neck slightly longer than wide, the longest setae longer than the width of flagellomere ( Fig. 1 B ). Thorax. Brown, setae dark. Anterior pronotum with 6 setae. Proepisternum with 5 setae. Scutellum with short setae. Wing. Fumose. Length 2.8 mm. Width/length 0.45. Anal lobe large. Veins distinct. stM equally long as fork of M. R1/R 0.7. c/ w 0.85. r-m and bM nearly equal in length. bM non-setose, r-m with 1–2 setae. Halter yellow. Legs. Pale brown, setae dark. Fore tibial organ with pale vestiture forming a row. Fore tibial spur longer than the tibial width. Claws without teeth. Abdomen. Brown, setae dark rather long and fine. Hypopygium ( Fig. 6 ). Brown, concolorous with abdomen. Intergonocoxal area moderate. Gonocoxae narrow, basally united (U-shaped), longer than gonostylus, with long and sparse setosity, medial margin sparsely setose, membraneous part with short setae, without microtrichia. Gonostylus narrow, subapically slightly constricted, slightly curved, richly setose, apex roundish, with numerous blunt setae, subapically with a row of spine-like megasetae, without apical tooth. Tegmen laterally slightly curved, with medial sclerotized structures, dorsally with small hyalinous apical part, with long, curved, strongly sclerotized basal apodemes, with a large area of strong aedeagal teeth. Aedeagal apodeme long.

Discussion. Bradysia fornicata sp. n. differs from all other species of the group in having its tegmen narrow, with a very small hyalinous process and with very long basal apodemes, and in having its gonostylus constricted subbasally.

Etymology. The name is Latin, fornicata , arched, referring to the strongly arched basal apodemes of the tegmen.

Figures

FIGURE 1. A, B. 4 th antennal flagellomere, frontal. C, D. Maxillary palpus, dorsolateral. A, D: Bradysia abrupta sp. n. (paratypes). B: B. fornicata sp. n. (holotype). C: B. luctifica (Skuse, 1888) (from Ceram). Scale 0.10 mm.

FIGURE 6. Bradysia fornicata sp. n. (holotype). A. Gonostylus, ventral. B. Part of hypopygium, ventral. Scale 0.10 mm.